How do I highlight a search result in tmux?

According to the developer¹, this isn't currently possible in tmux.

[1] http://sourceforge.net/mailarchive/message.php?msg_id=27427973

This feature appears to have been added in tmux version 2.4 and later.

Looking through tmux's release notes:

    CHANGES FROM 2.3 TO 2.4, 20 April 2017
     * All occurrences of a search string in copy mode are now highlighted;
       additionally, the number of search results is displayed. The highlighting
       updates interactively with the default emacs key bindings (incremental
       search).

I can confirm that highlighting doesn't work in tmux version 2.2, which I was using previously.

I know this article is a little outdated so I thought I might follow up with a possible solution, because I was recently looking for this and think I might have found a solution.

set-window-option -g mode-fg colour3
set-window-option -g mode-bg colour0